How to Unlock Password Protected PDF File

The password protected PDF files are becoming a new trend. They are great if you do not want anyone else other than the intended recipient to view the contents. But if you forget the password to open the PDF file, then there is nothing much to do but to ask the sender for the password. In case you have forgotten the password to a locked PDF file, then you can use the Free PDF Unlocker software to find the password and unlock it.

You can download Free PDF Unlocker from the website of the Free PDF Solutions. The download is available as an installer. The download is a small application of about 5 megabytes. After the installation, it runs automatically but you can also launch it from its desktop shortcut.

Free PDF Unlocker has a very simple user interface. Basically you have to add password protected files to it and then unlock them. To add a new password protected PDF file, click on the Add File button. The added file would show up in the listbox. If you already know the password and want to remove it from the PDF file, then click on Set Selected PDF Password button and set the password.

Now click on the Unlock button on the top to unlock and clear the password. If you already knew the password and had set it, then it will clear the password and save the unprotected unlocked PDF file in the destination folder. But if you had no idea about the password, then it would start the brute force method of guessing the password. The brute force method does not always work and may take hours or days to crack the password. But when if does guess the password, the unlocked PDF file would be saved in the selected folder.

In the settings of Free PDF Unlocker, you can choose which type of password attack should be performed on the locked PDF file. There are two options – Bruteforce or Dictionary attack. The bruteforce method works by guessing all the combinations of letters, numbers and other special characters one by one. you can choose which character sets you want to use in this method. The dictionary attack relies on applying all the words found in a dictionary text file. The application comes with a dictionary file of its own.

The Free PDF Unlocker is a userful tiny application that can help you unlock the PDF files, passwords of which you have forgotten. It can also be used to clear the passwords from the locked files if you do not want to be asked for the password each time you open those PDF files.